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(a) Acid ingestion, acute brake down of esophageal wall structure; colon interposition was performed. (b) Alkali ingestion, esophagus after 8 days with partial transmural necrosis. Conservative treatment led to a fibrotic asymmetric stricture with loss of wall architecture (c), requiring weekly bougienage (13 mm) until now. Only EUS-MP shows detailed pathological anatomy
